Don't build dyn tests on non-ia64
Don't build dyn tests on non-ia64

It looks like the dynamic frame support isn't fully baked on
non-ia64, leading to lots of mailing list comments about broken
tests (even though they're marked as supposed to fail, it's still
confusing).

unkadoug/libunwind,unkadoug/libunwind,vtjnash/libunwind,libunwind/libunwind,djwatson/libunwind,rantala/libunwind,rantala/libunwind,vtjnash/libunwind,frida/libunwind,unkadoug/libunwind,frida/libunwind,yuyichao/libunwind,yuyichao/libunwind,libunwind/libunwind,djwatson/libunwind,djwatson/libunwind,vtjnash/libunwind,yuyichao/libunwind,libunwind/libunwind,frida/libunwind,rantala/libunwind